younger version of himself. He is a part of an ancient sub-human race that has been fighting the aliens for three millennia. To motivate Sean to take on Sophia, he kills himself. Scott Michael Campbell as Justin Murphy – an agent working for the Office of Director of National Intelligence who is set up by undercover agents to appear as the traitor in the government who helped Sophia escape. Necar Zadegan as Isabel – an alien who is in a relationship with Thomas and supports his own agenda against Sophia. She is killed along with Thomas when Martinez fires a missile on the bus she and Thomas were on. Clea DuVall as Maya – an extraterrestrial who killed her boyfriend William for telling Sterling secrets about the detainees. She was later shot and killed by Thomas while trying to protect Sterling. Roger Bart as Richard Peel – the White House Chief of Staff. Development and production Producer Steve Stark brought the original script to NBC in 2009, after hearing that the network was looking for "event-type" series to add to its television lineup. The script was written by Nick Wauters in 2006. The show appeared on NBC's development slate in early January 2010, when the network announced at the Television Critics Association presentation that it had green-lit production of a pilot episode. Casting announcements began in early February, with Jason Ritter landing the lead role of Sean Walker. In late February, Željko Ivanek was cast as Blake Sterling, and Ian Anthony Dale signed on as Simon Lee. This was followed a few days later by the addition of Scott Patterson and Sarah Roemer to the cast. Roemer was cast as Sean's girlfriend, Leila Buchanan, with Patterson portraying her father, Michael. In late February, Laura Innes was cast as Sophia Maguire, a role which was originally envisioned as male. Blair Underwood came on board in early March in the role of President Eli Martinez, a role which was originally planned for a Hispanic actor. Finally, the addition of Taylor Cole completed the main cast. Jeffrey Reiner signed on to direct, after having agreed to a deal with Universal Media Studios to work on new projects. He also served as an executive producer. After having read the pilot script, he called it a "page turner." Lisa Zwerling, who also signed a deal with UMS, served as a consulting producer. On May 7,